Retainer flanging die
Through the combined design of pre-fringe unit and forming unit, the flange of the cylindrical cage is carried out in steps, solving the problem of stress concentration and thinning of the material when the end ring is folded, and achieving higher flange accuracy and production efficiency.
Patent Information
- Application Number
- CN202422380691.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-27
AI Technical Summary
During the manufacturing of cylindrical cages, the material is susceptible to large tensile and bending stress when the end ring is folded, resulting in thinning of the material in the corner area, affecting structural strength and overall safety.
The combination design of pre-flip unit and forming unit is adopted. By guiding the inclined surface and the butt inclined surface, the forming flip is completed between the right-angle forming surface and the positioning surface. The flip process is carried out in steps to reduce stress concentration and material thinning risks.
Improves flange accuracy and stability, reduces production costs, reduces crack risks, and improves production efficiency.
Smart Images
Figure CN223159957U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of cages processing molds, and particularly relates to a cage flanging mold. Background Art
[0002] A cylindrical cage is an important component in a bearing, mainly used to fix and guide rolling elements (such as rollers) to roll correctly and stably between the inner and outer rings. It includes two end rings and window beams evenly arranged between the two end rings. To further improve the structural stability and overall strength, a specifically designed cylindrical cage adopts a shape with the end rings turned outwards towards the center of the circle, which not only strengthens the structural foundation but also significantly enhances its ability to resist external stress and deformation. The entire cage is carefully manufactured through advanced stamping and one-piece forming technology, ensuring seamless connection and high-strength connection between all components, enabling it to maintain excellent performance in complex working environments.
[0003] However, during the manufacturing process, especially when it comes to the key link of end ring folding, the technical difficulty increases significantly. The traditional flanging mold process requires precisely folding the semi-finished end ring that was originally placed vertically to a horizontal state, and this transformation process greatly tests the plasticity of the material and the accuracy of the mold. Due to the inherent plastic deformation characteristics of the steel plate material during bending and the complexity of metal internal flow, the corner area often becomes the focus of stress concentration and material thinning, thereby weakening the strength of this area and constituting a potential strength shortcoming. It can be seen that the existing technology needs to be further improved. Summary of the Utility Model
[0004] The utility model provides a cage flanging mold, which solves the problem that during the manufacturing process of a cylindrical cage, when the end ring is folded at a large angle instantaneously, the material in the outer-turned corner area is subjected to large tensile and bending stresses, is prone to local thinning, reduces the strength of this area, and affects the overall structural safety of the cage.
[0005] To achieve the above object, the utility model provides the following technical solutions:
[0006] A cage flanging mold includes a pre-flanging unit and a forming unit;
[0007] The pre-flanging unit includes a first upper die assembly and a first lower die assembly. The first upper die assembly includes a pre-pressing and flanging die with a guiding inclined surface. The first lower die assembly includes wedge dies evenly distributed around the circumference of the cage blank. The wedge die is provided with a butt joint inclined surface and an arc-shaped abutting surface on the side facing the blank. Its arc-shaped abutting surface can closely fit the side wall of the blank during the pre-flanging process. When the pre-pressing and flanging die descends, the end of the blank is squeezed between the guiding inclined surface and the butt joint inclined surface to achieve preliminary flanging;
[0008] The forming unit includes a second upper die assembly and a second lower die assembly. The second upper die assembly includes a forming flanging die having a right-angle forming surface. The second lower die assembly includes a right-angle positioning die evenly distributed around the circumference of the retaining frame blank. The right-angle positioning die is provided with a right-angle positioning surface and an arc-shaped abutting surface facing the blank. The arc-shaped abutting surface can fit tightly against the side wall of the blank during the forming flanging process. The forming flanging die descends, and the end of the blank that is initially flanging is squeezed between the right-angle forming surface and the right-angle positioning surface to realize the forming flanging.
[0009] In the above structure, the pre-flanging unit makes the end of the retainer blank initially flanged by cooperating with the guiding bevel and the docking bevel. This process is relatively gentle, which reduces the stress concentration caused by the instantaneous large-angle folding of the material. After the initial flanging, the blank is further extruded to a 90-degree forming flange in the forming unit. Since it has undergone the initial flanging, the deformation of the material during the final flanging is reduced, thereby reducing the risk of material thinning. Since the flanging process is carried out in steps, the material has enough space and time to adapt to the deformation during each flanging, thereby reducing the risk of cracks caused by rapid large-angle folding. It not only solves the problems of stress concentration and material thinning in the traditional flanging process, but also improves the flanging accuracy, stability and production efficiency, and reduces production costs.
[0010] In a preferred implementation, the angle between the plane where the end of the blank for preliminary flanging is located and the horizontal plane is 45°.
[0011] If the tilt angle is too large or too small, the material may be subjected to excessive tangential or radial stress during the flanging process, thereby causing quality problems such as cracking and deformation. At the same time, flanging at other angles requires more complex mold design and higher manufacturing costs. The tilt angle between the plane where the end of the blank for the initial flanging is located and the horizontal plane is selected to be 45°, which has advantages in terms of material deformation uniformity, mold design convenience, process effect optimization and actual application verification.
[0012] In a preferred implementation, the first upper mold assembly and the second upper mold assembly are both configured with vertically guided columns, a first inclined surface is set at the bottom of the column, and a second inclined surface is set on the side of the inclined wedge mold and the right-angle positioning mold facing away from the blank. When the column is pressed down, the first inclined surface and the second inclined surface can contact, so that the inclined wedge mold and the right-angle positioning mold are pushed toward the blank and move toward the blank.
[0013] Due to the design of the inclined surfaces, when the column continues to press down, the first inclined surface will slide downward along the second inclined surface. During this process, the mutual force between the inclined surfaces will generate a horizontal component, that is, a thrust force towards the blank. This thrust force directly acts on the wedge die and the right-angle positioning die, pushing them to move towards the blank. Without the need to configure a separate horizontal driving power component, the entire processing process is more coherent. The downward pressing action of the column directly triggers the movement of the wedge die and the right-angle positioning die, reducing intermediate links and potential failure points, and improving the stability and efficiency of processing.
[0014] In a preferred implementation, both the wedge die and the right-angle positioning die are connected to a reset structure. Both the wedge die and the right-angle positioning die have a first position and a second position. When the wedge die and the right-angle positioning die are in the first position, the column can press down and the first inclined surface and the second inclined surface can come into contact. When the wedge die and the right-angle positioning die are in the second position, the wedge die and the right-angle positioning die can abut against the side wall of the blank; when the column moves upward, the reset structure can return the wedge die and the right-angle positioning die from the second position to the first position.
[0015] In a preferred implementation, the reset structure includes a stop block. The stop block is installed on the lower die base. A spring post is installed on the stop block. The spring of the spring post is arranged on one side of the stop block. One end of the spring post passes through the stop block and is connected to the wedge die / right-angle positioning die.
[0016] In a preferred implementation, the length of the column is greater than the length of the pre-pressing flanging die / forming flanging die, so that the column can first drive the wedge die / right-angle positioning die to abut against the outer wall of the blank to be processed, and then perform the flanging operation.
[0017] When the column first drives the wedge die / right-angle positioning die to abut against the outer wall of the blank to be processed, it is actually creating a stable support foundation for the subsequent flanging operation, preventing the lower side area of the blank from being accidentally bent or deformed during the flanging process, thereby improving the processing accuracy.
[0018] In a preferred implementation, both the first lower die assembly and the second lower die assembly include a lower template and a lower die base. The lower template is arranged on the upper side of the lower die base. A protruding positioning post is provided at the center of the lower template. A plurality of wedge dies / right-angle positioning dies are arranged circumferentially around the positioning post. The size of the positioning post is adapted to the inner diameter of the cage blank.
[0019] In a preferred implementation, an entry section is provided below the guiding inclined surface of the pre-pressing flanging die / the right-angle forming surface of the forming flanging die. The entry section can enter the inside of the blank and abut against the inner wall of the blank to ensure that the blank is flanged outward.
[0020] In a preferred implementation, an avoidance portion is provided at the bottom of the wedge die / right-angle positioning die facing the blank. The size of the avoidance portion is adapted to the thickness and length of the blank after flanging.
[0021] In a preferred implementation, the second lower mold assembly also includes a lifting structure, which includes a lifting plate. The lifting plate passes through the lower mold plate and the lower mold base and is arranged on the outside of the positioning column. The lifting plate can be raised and lowered to be flush with or higher than the plane of the lower mold plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:
[0023] Figure 1 A schematic structural diagram of an exemplary embodiment of the pre-flanging unit of the present application in its initial state is depicted;
[0024] Figure 2 A schematic structural diagram of a schematic implementation scheme of the pre-flanging unit in the present application in a processing state is depicted;
[0025] Figure 3 A schematic structural diagram of a schematic implementation scheme of the first lower mold assembly of the present application is depicted;
[0026] Figure 4 A schematic structural diagram of an exemplary embodiment of the molding unit of the present application in its initial state is depicted;
[0027] Figure 5 A schematic structural diagram of a schematic embodiment of the molding unit processing state of the present application is depicted;
[0028] Figure 6 A schematic structural diagram of a second lower mold assembly of the present application is depicted;
[0029] Description of labels:
[0030] 1-upper die base; 2-upper clamping plate; 3-lower die plate; 4-lower die base; 5-pre-pressing flanging die; 50-guide slope; 6-oblique wedge die; 60-jointing slope; 61-second inclined surface a; 7-forming flanging die; 70-right-angle forming surface; 8-right-angle positioning die; 80-right-angle positioning surface; 81-second inclined surface b; 9-column; 90-first inclined surface; 10-positioning column; 11-reset structure; 110-stop block; 111-spring column; 12-avoidance part; 13-elevator plate. DETAILED DESCRIPTION
[0031] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.
[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.
[0033] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0034] In the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.
[0035] The present utility model will be described below in conjunction with the drawings of the specification.
[0036] The specific solution adopted is:
[0037] As Figures 1-6 shown, the present utility model provides a cage flanging die, including a pre-flanging unit and a forming unit;
[0038] The pre-flanging unit includes a first upper die assembly and a first lower die assembly. The first upper die assembly includes a pre-pressing and flanging die 5 having a guiding inclined surface 50. The first lower die assembly includes inclined wedge dies 6 evenly distributed around the circumference of the cage blank. The inclined wedge die is provided with a butt joint inclined surface 60 and an arc-shaped abutting surface on the side facing the blank. Its arc-shaped abutting surface can closely fit the side wall of the blank during the pre-flanging process. The pre-pressing and flanging die 5 descends, and the end of the blank is extruded between the guiding inclined surface 50 and the butt joint inclined surface 60 to achieve preliminary flanging;
[0039] The forming unit includes a second upper mold assembly and a second lower mold assembly. The second upper mold assembly includes a forming flanging mold 7 with a right-angle forming surface 70. The second lower mold assembly includes a right-angle positioning mold 8 evenly distributed around the circumference of the retaining frame blank. The right-angle positioning mold is provided with a right-angle positioning surface 80 and an arc-shaped abutting surface facing the blank. The arc-shaped abutting surface can fit tightly against the side wall of the blank during the forming flanging process. The forming flanging mold 7 descends, and the end of the blank with the preliminary flanging is squeezed between the right-angle forming surface 70 and the right-angle positioning surface 80 to realize the forming flanging.
[0040] See also Figure 1 、 2 , 4 and 5, the first upper die assembly and the second upper die assembly both include an upper die base 1 and an upper clamping plate 2, the upper clamping plate 2 is arranged on the lower side of the upper die base 1, the pre-pressing flanging die / forming flanging die is installed on the upper clamping plate 2, the first lower die assembly and the second lower die assembly both include a lower template 3 and a lower die base 4, the lower template is arranged on the upper side of the lower die base, a protruding positioning column 10 is provided in the center of the lower template, the size of the positioning column is adapted to the inner diameter of the retaining frame blank.
[0041] Multiple inclined wedge molds / right-angle positioning molds are set around the positioning column. The inclined wedge mold / right-angle positioning mold is located on the upper side of the lower mold plate and can move horizontally. The guiding inclined surface / right-angle positioning surface set by the inclined wedge mold / right-angle positioning mold is actually a part of the 1 / 4 circumferential surface. Figure 3 and Figure 6 Four such molds are combined to form a complete circle, and the overall structure is in the shape of an inverted frustum.
[0042] As a preferred embodiment of the present application, the inclined angle between the plane where the end of the blank for preliminary flanging is located and the horizontal plane is 45°.
[0043] The 45° angle helps disperse stress during the flanging process, reducing stress concentration. Compared to flanging directly to 90°, this step-by-step flanging method allows the material to bear stress more evenly during deformation, thereby reducing the risk of cracking. Forming the flanging at a 45° angle makes it easier to control the angle and shape of the flanging, improving the accuracy and consistency of the flanging.
[0044] As a preferred embodiment of the present application, the first upper mold assembly and the second upper mold assembly are both equipped with a vertically guided column 9, a downward pressing space is set in the lower mold plate, a first inclined surface is set at the bottom of the column, and a second inclined surface is set on the side of the inclined wedge mold and the right-angle positioning mold facing away from the blank. When the column is pressed down, the first inclined surface 90 and the second inclined surface a61 / second inclined surface b81 can contact, so that the inclined wedge mold and the right-angle positioning mold are subjected to a thrust toward the blank and move toward the blank.
[0045] The working principle is as follows: The first inclined surface 90 provided at the bottom of the column 9 corresponds to the second inclined surface on the side of the wedge die or the right-angle positioning die away from the blank. When the mold starts to close and the column is pressed down with the upper die assembly, the two inclined surfaces will come into contact and generate a mutual acting force. Due to the design of the inclined surfaces, when the column continues to be pressed down, the first inclined surface will slide downward along the second inclined surface. During this process, the mutual acting force between the inclined surfaces will generate a horizontal component, that is, a thrust force towards the blank. This thrust force directly acts on the wedge die and the right-angle positioning die, pushing them to move towards the blank direction. Without the need to configure a separate horizontal driving power component, the entire processing process is more coherent. The downward pressing action of the column directly triggers the movement of the wedge die and the right-angle positioning die, reducing intermediate links and potential failure points, and improving the stability and efficiency of processing.
[0046] Furthermore, both the wedge die and the right-angle positioning die are connected to a reset structure 11. The wedge die 6 and the right-angle positioning die 8 both have a first position and a second position. Refer to Figure 2 and Figure 3 , the reset structure includes a stop block 110. The stop block is installed on the lower die base 4. A spring post 111 is installed on the stop block. The spring of the spring post is provided on one side of the stop block. One end of the spring post passes through the stop block and is connected to the wedge die / right-angle positioning die.
[0047] First position: When the mold is in the initial state or ready for processing, the wedge die and the right-angle positioning die are in the first position; Second position: As the column is pressed down, the first inclined surface comes into contact with the second inclined surface and generates a thrust force, pushing the wedge die 6 and the right-angle positioning die 8 to move towards the blank direction until they abut against the side wall of the blank. At this time, the mold is in the second position. When the column moves upward, the first inclined surface separates from the second inclined surface, and the wedge die and the right-angle positioning die no longer receive the thrust force towards the blank direction. At this time, the spring in the spring post starts to play a role, and through its elastic force, it pulls the wedge die and the right-angle positioning die back to the first position to complete the reset process.
[0048] Through the automatic reset function of the reset structure, the mold can quickly return to the initial position and be ready for the next processing, thereby improving the processing efficiency.
[0049] In addition, in order to ensure that the column will not interfere with the spring post during the upward movement, an avoidance groove for the spring post is provided at the center of the column. This design ensures the smooth operation of the mold during the reset process.
[0050] As a preferred embodiment of the present application, the length of the column 9 is greater than the length of the pre-pressing flanging die 5 / forming flanging die 7, so that the column can first drive the wedge die / right-angle positioning die to abut against the outer wall of the blank to be processed, and then perform the flanging operation. When the column first drives the wedge die / right-angle positioning die to abut against the outer wall of the blank to be processed, it actually creates a stable support foundation for the subsequent flanging operation, preventing the lower side area of the blank from being accidentally bent or deformed during the flanging process, thereby improving the processing accuracy.
[0051] Furthermore, an entry section is provided below the guiding inclined surface of the pre-pressing flanging die / the right-angle forming surface of the forming flanging die. Its diameter is adapted to the inner diameter of the blank. The entry section can first enter the interior of the blank and abut against the inner wall of the blank, ensuring that the blank can only be flanged outwards and will not be folded inwards.
[0052] As a preferred embodiment of the present application, an avoidance portion 12 is provided at the bottom of the wedge die / right-angle positioning die facing the blank. The size of the avoidance portion is adapted to the thickness and length of the blank after flanging. When one side of the blank is flanged, the blank is flipped. During the processing, the already processed flanged part can naturally enter the avoidance portion, thus avoiding direct contact with the wedge die / right-angle positioning die, which effectively prevents the already flanged part from being unnecessarily squeezed or deformed during subsequent processing.
[0053] As a preferred embodiment of the present application, the second lower die assembly further includes a blank ejecting structure. The blank ejecting structure includes an ejector plate 13. The ejector plate penetrates through the lower template and the lower die base and is arranged outside the positioning column. The ejector plate can be lifted and lowered, and the lifting and lowering action can be realized through a lifting mechanism (such as a cylinder, a hydraulic cylinder, a lead screw, etc.) to be flush with or higher than the plane of the lower template. During the processing, the ejector plate remains at a position below or flush with the plane of the lower template to avoid interfering with the processing process. At this time, the cage blank is placed on the positioning column and fixed by the wedge die / right-angle positioning die. When the processing is completed, the mold control system issues a signal to start the lifting mechanism. The lifting mechanism drives the ejector plate to rise until it is higher than the plane of the lower template and contacts the bottom of the cage blank. As the ejector plate continues to rise, it exerts an upward force on the cage blank, causing it to gradually disengage from the positioning column. When the ejector plate rises to a certain height, the cage blank will completely disengage from the positioning column and be in a position where it is easy to take out.
[0054] The working process of the above structure:
[0055] Preparation
[0056] Placing the blank: Carefully place the cage blank on the positioning column on the lower template of the pre-flanging unit. Through the precise positioning of the positioning column, ensure that the blank will not shift during subsequent processing.
[0057] Initial flanging
[0058] The mold descends: The pre - pressing flanging die and the column start to descend under the drive of the control system.
[0059] The wedge die is pushed: As the mold descends, the wedge die is pushed, and its arc - shaped abutting surface closely fits the outer wall of the blank. The purpose of this step is to initially position the blank and prepare for the flanging operation.
[0060] The flanging starts: The entering section of the pre - pressing flanging die, whose diameter matches the inner diameter of the blank, gradually enters the interior of the blank and abuts the interior of the blank. At the same time, the end of the blank is squeezed between the guiding inclined surface and the docking inclined surface of the pre - pressing flanging die.
[0061] The initial flanging is completed: Through the combined action of the guiding inclined surface and the docking inclined surface, the end of the blank is squeezed and deformed to achieve the initial flanging. The angle of the initial flanging is set at 45°. The selection of this angle is usually based on the design requirements of the product and the processing capabilities of the mold.
[0062] The mold resets: After the pre - pressing flanging die and the column continue to rise to the in - place position, the wedge die returns to its initial position. At this time, the initial flanging has been completed.
[0063] The ejector plate rises: To remove the processed blank, the ejector plate rises under the control of the control system. When the ejector plate rises to a certain height, the cage blank is lifted and separated from the positioning post, thus facilitating the subsequent part - taking operation.
[0064] Forming flanging
[0065] After the initial flanging is completed, the initially flanged blank is transferred to the forming flanging die, and the forming flanging can be completed according to the above process.
[0066] What is not described in this utility model can be realized by adopting or referring to the existing technology.
[0067] The above is only the specific implementation manner of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by this utility model can easily think of various changes or substitutions, and these should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be subject to the protection scope of the claims.
Claims
1. A cage flanging die, characterized in that, Including pre-flanging unit and forming unit; The pre-flanging unit includes a first upper die assembly and a first lower die assembly, the first upper die assembly includes a pre-pressing flanging die with a guide inclined surface, and the first lower die assembly includes an inclined wedge die evenly distributed around the circumference of the retainer blank, the inclined wedge die is provided with a docking inclined surface and an arc-shaped abutting surface on the side facing the blank, and the arc-shaped abutting surface can closely fit the side wall of the blank during the pre-flanging process, and the pre-pressing flanging die descends, and the end of the blank is squeezed between the guide inclined surface and the docking inclined surface to achieve preliminary flanging; The forming unit includes a second upper die assembly and a second lower die assembly. The second upper die assembly includes a forming flanging die having a right-angle forming surface. The second lower die assembly includes a right-angle positioning die evenly distributed around the circumference of the retaining frame blank. The right-angle positioning die is provided with a right-angle positioning surface and an arc-shaped abutting surface facing the blank. The arc-shaped abutting surface can fit tightly against the side wall of the blank during the forming flanging process. The forming flanging die descends, and the end of the blank that is initially flanging is squeezed between the right-angle forming surface and the right-angle positioning surface to realize the forming flanging.
2. The cage flanging die according to claim 1, characterized in that, The angle between the plane where the end of the blank for preliminary flanging is located and the horizontal plane is 45 degrees.
3. The cage flanging die according to claim 1, wherein, The first upper mold assembly and the second upper mold assembly are both equipped with vertically guided columns, a first inclined surface is set at the bottom of the column, and a second inclined surface is set on the side of the inclined wedge mold and the right-angle positioning mold facing away from the blank. When the column is pressed down, the first inclined surface and the second inclined surface can contact, so that the inclined wedge mold and the right-angle positioning mold are pushed toward the blank and move toward the blank.
4. The cage flanging die according to claim 3, characterized in that, The inclined wedge mold and the right-angle positioning mold are both connected to the reset structure. The inclined wedge mold and the right-angle positioning mold both have a first position and a second position. When the inclined wedge mold and the right-angle positioning mold are in the first position, the column presses down the first inclined surface and the second inclined surface so that they can contact. When the inclined wedge mold and the right-angle positioning mold are in the second position, the inclined wedge mold and the right-angle positioning mold can abut the side wall of the blank; when the column moves upward, the reset structure can make the inclined wedge mold and the right-angle positioning mold return to the first position from the second position.
5. The cage flanging die according to claim 4, characterized in that, The reset structure includes a stopper, which is installed on the lower die seat. The stopper is equipped with a spring column, the spring of the spring column is arranged on one side of the stopper, and one end of the spring column passes through the stopper to connect the inclined wedge die / right-angle positioning die.
6. The cage flanging die according to claim 3, characterized in that, The length of the column is greater than the length of the pre-pressing flanging die / forming flanging die, so that the column can first drive the inclined wedge die / right-angle positioning die to abut against the outer wall of the blank to be processed, and then perform the flanging operation.
7. The cage flanging die according to claim 1, characterized in that, The first lower die assembly and the second lower die assembly both include a lower die plate and a lower die base. The lower die plate is arranged on the upper side of the lower die base. A protruding positioning column is provided in the center of the lower die plate. Multiple inclined wedge molds / right-angle positioning molds are arranged around the positioning column. The size of the positioning column is adapted to the inner diameter of the retainer blank.
8. The cage flanging die according to claim 1, characterized in that, An entry section is provided on the lower side of the guiding slope of the pre-pressing flanging die / the right-angle forming surface of the forming flanging die. The entry section can enter the interior of the blank and abut against the inner wall of the blank to ensure that the blank is flanging outward.
9. The cage flanging die according to claim 1, characterized in that, The bottom of the inclined wedge mold / right-angle positioning mold facing the blank is provided with an avoidance portion, and the size of the avoidance portion is adapted to the thickness and length of the blank after flanging.
10. The cage flanging die according to claim 7, characterized in that, The second lower mold assembly also includes a ejection structure, which includes an ejection plate. The ejection plate passes through the lower mold plate and the lower mold base and is arranged on the outside of the positioning column. The ejection plate can be raised and lowered to be flush with or higher than the plane of the lower mold plate.